To view how much space is available for different data types, select Menu > Applications > Office > File mgr..
Many features of the device use memory to store data. The device notifies you if the memory in different memory locations is low.
To free memory, transfer data to a compatible memory card (if available) or to a compatible computer.
To remove data you no longer need, use File manager or open the respective application. You can remove the following:
Messages in the folders in Messaging and retrieved e-mail messages in the mailbox
Saved web pages
Applications shown in Application manager that you do not need
Installation files (.sis or .sisx) of applications you have installed. Transfer the installation files to a compatible computer.
Images and video clips in Gallery. Back up the files to a compatible computer.